Stop selling internal combustion cars (petrol and Diesel) by 2035. That was last summer’s proposal from the European Commission, that has now to be ratified by the European Parliament within two years. It is just a proposal clear, which still takes widening and clarifying in details, timing and possible alternatives. Yet it’s there to mark a clearly defined tendency to heavily affect all sectors of mobility, including navigation. In this perspective, electric engines cannot possibly be the only alternative: there will have to be an array of intertwined technology and energy sources. As ACEA states, the European constructors’ association: their initial view of the proposal was actually negative because, they claim, “clinching to one sole technology is no constructive way to look ahead”. Specifically concerning marine engines, the “green objective, i.e. their decarbonization, implies using a set of valid alternatives to side electric
